Pile-driver attachment for rock drills



p 1930. w.-A. SMITH, sRQET AL 1,776,521

FILE DRIVER ATTACHMENT FOR ROCK DR'ILLS Filed Nov. 4, 1929 m Tm i W m w w INVEN TOR THEmQTTokNE;

I Patented Sept. 23, 1930 h I 3 ,v

IUNITED STATES WILLIAM A. sMIT I, SR}, or EASTON, PENNSYLVANIA, Ann WILLIAM A. SMIT In;

on PHILLIPSBURG, NEW. JERSEY, ASSIGNORS T INGEHSOLL-RANDCOMPANY, or

JERSEY crrY, NEW JERSEY, A CORPORATION on NEWJERSEY' I V I HIE-DRIVER ArrAcrIMENTroR nooxnn rnns a I Application filed n vembera' sae, Serial No. 104301. .y

' This invention relates to pile driversy'but I 'more particularly to a pile driver attachment for rockdrills of the hammer type.

One object of the invention is to obtain a rugged and efiicient pile driving attachment which maybe applied to and removed from the'cwork with a minimum expenditure of time and effort.

Another object is tosimplify the construction and reduce the cost of i manufacturing v of an attachment of this type.

Other objects will beinpartobvious and in part pointed out hereinafter.

In the accompanying drawings forming part of the following 'specificationand in "which similar reference characters refer to similar parts,

' "Figure 1 is a sectional 7 away,'and

elevation of the attachment, I p p Figure 2 is aside elevation, partly broken Figure 3 is a transverse View taken through 'Figure l on the line 33 looking in the di- 1 .rectio'n indicated by the arrows.

Referring to the drawings, the invention is i shown applied to a fiuid actuated rock drill, only a 'portion of thecylinder A and'the hammer piston B therein being shown. I

j "In' accordancewith the present invention, the rock drillis provided with 'a driving attachment .designatedgei1erally by (l and,

which may be suitably clamped in the assembled position with respect to the cylinder A by meansof side bolts 1). The attachment =G comprises-a pair of symmetrical members or half-sections E having lugs F at the rearward ends through which'the bolts D extend;

i The members E'may be clamped'securely to- "getheryin face to facerelationshipby any suitable means as for instance by bolts G.

In the contiguous surfaces of the members I are rectangular'grooves I-I whichregister Jwith' each othertoform a rectangular bore J :in theattachment'Q In the rearward end of theattachment: is a fcavity K which may i ibe of substantially the same diameter as the (cylinder, and in'the side walls of the grooves H are formed passages L which communicate with atmospheric vents O to convey from the fr ont end of the cylinder any compres sion'which may bea eaa bythe aloma which would otherw se cushion" the forward stroke of the said piston. f

At theforward ends of the members E are 1 spaced vwith respect to each other tog form integral; extensions "P which are suitably therebetween a slot Q for the reception of the endofa pilejR." The eXtensionsP maybe" so spaced that the slotQ will be of a width capable of receiving piles of considerable thickness. When used, however; for driving;

piles 'of'r elatively small width cheek plates S may besecu red togthe inner, surfaces of the extensions as by eans of bolts Tito reduce the widthof the slotQ, g w The'cheek platess In'ayvary in'width in accordance with the thickness of thepiles intended to be" driven and in order to pro tect the bolts T against'tlie'efl'ects of such blows of the striking blockas may bede livered against the cheek 'pflates, said cheek Plates m y. be Pr ded. with ng es h ch at in g ves. inf e nne s r-,1

faces of the extensions, P. 1

' An addit'onal anemone: the cheek'platesf Sis to act as 'a stop for a strikingbkx k W which ispreferably of rectangular shape and is disposedin the rearward end oftheslot; Q, to. transmit the blowsof the hammer; pis; ton B to the {pile R. The striking block X "for engagement withjthe pile R and has a rectangular stem Y which extends slidably;

through the rectangular grooves H1 and into the cavity K to receive the blowsof the'hammer piston B. I I In iorder that tlije Cooperating surfaces of m-rEm OFFICE f thefrectan'gular bored and the stem Y of the striking block mayat all times be suitably I lubricated the members E are provided with grooves Z which extend from the cavity K along the wall of the bore J to a point well toward'the forward end of the said bore J.

In this way a portion of the lubricant entrained by the pressure fluid utilized for ac- 7 through thebore piston in the cylinder, of a front head hav-' ing a rectangular bore-therethrough, QXtQI'l sions on the front head spaced with respect to each other to form a-slot for the reception of a pile, a striking blockin the slot,, and fa rectangular stern; on the rstrikingt block slidable in the bore and extending rearwardv 1y thereof to receive the blows of the h'ammer'pistorrm I J I *2. Thecombination. withza fluid actuated-t rockdrill having a cylinder and a-hammer piston in the cylinder, of a front head corn V I prising a pair of half-sections each having 7 a longitudinal groove in their contiguous.

surfaces to form a bore, extensionsbnthe'. e half-[sections spaced with respect5 to each i other toform a-"slotforthefreception of the end of a pile, a striking block jin the slot, and

a stem on' the striking blockand extending togjieCeive the blows of the hammer piston. v i i ThGICOIHblIlfLtlOIi with a fluid actuated rock drill having-lacylinde rf 'and a hammer 7 piston therein, of a frontihead hailing arec'; v V tangular bore and fa'cavityiattherearward end of the' bore, integrallextensions on the fronthea'dspaced With respect ,to each other to vform a slot forthereceptionjof the end of a" pile, a striking, block in the slot, a rec-. e tangu'la'r stem on the striking block. slidable V i the b orerand extending into'thecavity to, receive the blowsof the hammervpiston, and a passage in theffr ont head "to 'coni eyi compression'from the'cayity to the atmds:

V 4. Thefcombination,with. a fiui'dyac'tuated rock drill having a cylinder and ahammer: p

piston in the cylinder; of a pairof sym' metrical' members disposed -in face to" face.

relationship to; form affronthead rectanej gular groovesfin-the adjacentsurfaces of the V mernherszand in registry With'ea ch other to, r form a rectangular bore, meansfzor clamp-r v ing thememlcerstogetheriiextensionslon'the;

members spaced to formvaslot-therehetween V I Intestinl'onywyhereef astriking-blockinlthe--slot,- andarectangularsteint on thefstriking 'block and extending" 1 -l 1 thro -ghthe'bore'to rec'eivethe*blowsof hammer piston-Q. s ecification. W SR3 r 

